电子产品工艺 调频收音机分析

1PingdingshanIndustrialCollegeofTechnologyBTECHNDinElectrical/ElectronicEngineeringUnit21AdvancedComputer-AidedDesignTechniquesAssignmentNameofStudentSunXinyaUnitTitleUnit30:ManufacturingElectronicProductsAssignmentTitleThyristordimmingcircuitdesignandfabricatioAssignmentNoAssignment2NameofTutorTonghuigaoNameofInternalVerifierSubmissionDeadlineMay15,2011.OutcomesandAssessmentCriteriaOutcomeAssessmentCriteriaFeedbackTutor’sdecisionInternalVerification3Describethedesign，manufactureandtestingofPrintedCircuitBoardsDiscussthedesignandsimulationofsingle-andmulti-layerPCBs3a4InvestigatethemethodsofassemblingelectronicproductsDescribethemethodsoftestingcompletedPCBsandfinishedelectronicproducts4a2MeritGradeCriteriaMeritDescriptorsIndicativeCharacteristicsFeedbackTutor’sdecisionInternalVerificationM1identifyandapplystrategiestofindappropriatesolutionsPCBboardlayoutwillbeacomprehensiveanalysisoftherules.M1bM2select/designandapplyappropriatemethods/techniquesPCBboardlayoutintegratedapplicationoftheprinciplesandrequirements,drawthyristordimmingcircuitPCBmap.M2bM3presentandcommunicateappropriatefindingsInthewaveformmeasurementreports,graphicsandsymbolsmarkedcorrectly.M3bDistinctionGradeCriteriaDistinctionDescriptorsIndicativeCharacteristicsFeedbackTutor’sdecisionInternalVerificationD1usecriticalreflectiontoevaluateownworkandjustifyvalidconclusionsConsolidatedexistingknowledgeandobservations,drawnwaveforms.D1aTheuseoflayoutprinciplesdrawncorrectlyassesstheirownstrengthsandweaknessesofPCBboard.D1bD3demonstrateconvergent/lateral/creativethinkingGeneraldescriptionoflaboratory-sidedPCBversionoftheproductionprocess。D3c3ProductiontomeettherequirementsofthethyristordimmingcircuitPCB.D3dInternalverificationofassignmentbrief(finalagreedversion)IVnameDateIconfirmthatthisisallmyownworkStudentsignatureProfessor’ssummativefeedbackandcommentsSignatureDateStudent’scommentsonprofessor’sfeedback4SignatureDateANSWERALLTASKSScenario:Youhavebeengivenworkexperienceinanengineeringfirmandtheseniordesignengineerhasgivenyouthefollowingtaskstoperform.Task1:ⅰ)PCBboardlayoutshouldfollowthegeneralprinciplesofwhat?1.Layoutaretwoways,oneisaninteractivelayout,theotheristheautomaticlayout,thelayoutisgenerallybasedontheautomaticlayoutwithinteractiveadjustmentofthelayoutcanbethecaseunderthedoorcircuittracesre-Distribution,theexchangeofthetwogates,makingiteasytoroutethebestlayout.2.Thesuccessofaproduct,itisnecessarytopayattentiontotheintrinsicquality,andsecond,takingintoaccounttheoverallappearance,bothcanbemoreperfectthattheproductissuccessful.InaPCBboard,componentlayoutrequirementsshouldbebalanced,densityandorderly,nottop-heavyorasink.ⅱ)PCBboardlayoutshouldfollowthegeneralprinciplesofwhat?1,theremustbeareasonabledirection:suchasinput/output,AC/DC,strong/weaksignal,highfrequency/lowfrequency,high/low,etc....,theyaretobelinearly(orseparation),noteachotherblend.Theaimistopreventmutualinterference.Thebestdirectionisastraightline,butingeneralnoteasytoachieve,themostunfavorabletothering.2,thechoiceofagoodground.3,therationalarrangementofpowersupplyfiltering/decouplingcapacitors.54,thelinesareabout:notqualifiedtodowidelinesandmeticulous;pressureandGardenslipfrequencylineshouldnothavesharpchamfering,turningandshallnotuserightangle.Groundshouldbeaswideaspossible,preferablyusingalargeareadepositionofcopper,5,thedesignshouldminimizetheholeovertheline.Withthedensityoftheparallellinestooeasilyweldedtogetherintoone.Therefore,thelineardensityshouldbeconsideredtodeterminethelevelofweldingtechnology.Thedistanceistoosmalljoints,isnotconducivetomanualwelding,canonlyreducetheefficiencytosolvetheweldingquality.Task2:ⅰ)drawtheirownthyristordimmingcircuitdiagramdisplayedinthefollowing。ⅱ)drawtheirownPCBthyristordimmingcircuitdiagramdisplayedinthefollowing。6Task3:Accordingtotheoscilloscopemeasurements,thecorrespondingpointinthetablebelowthewaveformplot。VoltageNameObservationpointWaveformAfterthepulsatingvoltagebridgerectifier1—0Trapezoidvoltagesynchronous2—0Sawtoothvoltage(Rplarger)3—0Sawtoothvoltage(Rpsmall)3—07Outputpulse(Rplarger）4—0Outputpulse(Rpsmall)4—0Anodevoltage(Rpsmall)5—0Voltageacrossthelamp(Rplarger)1—5Task4:Descriptionthyristordimmingcircuitproductionprocessofsingle-sidedPCBversion。Cutting→Patterntransfer→Etching→Removalofprintedmaterials→Drilling→Printingsolder→Spraytin→Indiancharacters→Inadditiontothefluxcoating→Check→Finished8GeneralNotestostudents:·Completethecoversheetandsignthestatementofauthenticity.·UsetheHarvardreferencingsystem.Takegreatcarethatifyouuseotherpeople’sworkorideasinyourassignment,youproperlyreferencetheminyourtextandanybibliography.(Ifyouarecaughtplagiarising,youcouldhaveyourgradereducedtozero,oratworst,youcouldbeexcludedfromthecourse)·Checkcarefullythesubmissiondateandtheinstructionsgivenwiththeassignment.Lateassignmentswillnotbeaccepted.Ifyouareunabletohandinyourassignmentontimeandhavevalidreasonssuchasillness,youmayapply(inwriting)foranextension.AddedNotes:·Thedeadlineforsubmittingassignmentis07/05/2010,4PMatTeachingOffice3420.Returndateform